8010122: Add defaults for ConcurrentMap operations to Map
Reviewed-by: darcy, briangoetz, mduigou, dholmes, ulfzibis
Contributed-by: NDoug Lea &lt;dl@cs.oswego.edu&gt;, Henry Jen &lt;henry.jen@oracle.com&gt;, Akhil Arora &lt;akhil.arora@oracle.com&gt;, Peter Levart &lt;peter.levart@gmail.com&gt;, Mike Duigou <mike.duigou@oracle.com>